Draw works



H. L.. TURNEY Nov. 6, 1934..

DRAW WOR K S Filed July 7, 1935 3 SheetsSheet"l G JNVENT V /ZZW ATTORNEYS.

H, L. TURNEY Nov. 6, 1934..

DRAW-WORKS Filed July '7, v195s 3 Sheets-Sheet 2 IN V EN OR.

A TTORNEYS.

Nov, 6, 1934.

H. L. TURNEY 1,979,780

DRAW WORKS Filed July '7, 1933 s Sheets-Sheet 3 IBM]! II II II II BY 7 2%,,,,f

ATTORNEYS.

Patented Nov. 6, 1934 v NT OFFICE DRAW WORKS Barry L. Turney, LosAngeles, Calif.

Application July 7, 1933, Serial No. 679,441 In Great Britain July 7,1932 5 Claims.

' In the drillingof deep wells the line supporting the tool in handlingthe tool is subjected to very heavy loads. The drum from which the lineis operated has been controlled during the unwinding and lowering of thetool by brakes on the drum. These draw works are,'or may be, driven froma motor through a speed changing device. One of the features of thepresent invention is to utilize the braking power of the motor to retardthe'unwinding action of the drum during the lowering operation of thedrill. It is also a feature of the invention to utilize portions of thesame mechanism that is used for retarding the drum to control the drumand. the playing out of the line during the drilling operation. Featuresand details of the invention will appear from the specification andclaims.

A preferred embodiment of the invention is illustrated in theaccompanying drawings as follows:-

Fig. 1 shows aside elevation of the apparatus.

Fig. 2 a side elevation of the crown of the drill supporting means.

-. Fig. 3 a plan view of the"crown.

Fig. 4 a view showing the arrangement of the gearing of-the draw works,the several shafts of the several gears being brought to the same plane.This is accomplished by swinging the two shafts 49 and 59 on the centerof the shaft 26 and off-setting the shaft 33 to permit the gears on theshafts 49 and59 to clear. This maintains the relation of all the gearsexcept the gears 30 and 32, the numbering of the parts being hereinafterindicated.

Fig. 5 shows a section of the unwinding connection.

Fig. 6 a section on the line 6-6 in Fig. 5. Fig. 7 a section on the line7-7 in Fig. 4. Fig. 8 is a side elevation of the hoisting engine fromthe reverse side of that shown in Fig. 1.

,1 marks thedrill pipe, 2 the drill table, and 3 the crown supported bythe usual derrick (not shown). The crown has a frame 4. Bearings 5 aremounted on the frame carrying a shaft 6 on which a series of sheaves 7are journaled. A hanger 8 is arranged on the frame and carries a sheave10 extendingat right angles to the sheave! and at one side thereof. Atthe opposite side of the crown a sheave 10a is similarly mounted. Thesheave 10a. is mounted in a hanger 8a,

. one of the hangers being pivotally mounted at 9 on the frame. The freeend of the hanger is 14. The free end of the bars. 12 rest on a rod 19which is connected with the free end of the bars by a cross pin 20. Therod 19 extends from a plunger 21. The plunger is mounted in a cylinder22 supported by the frame. A pipe 23 extends from the bottom of thecylinder'22 to a point of control and an indicator gauge 24 is connectedwith the pipe 23 so as to indicate the pressure below the plunger 21.

A line 17 runs .over a sheave 7 and is carried through a series ofsheaves 16 in a block 15, the hook of which carries the drill pipe 1.The line after extending through the sheaves 16 and 10 is carried overthe sheave 10a and then extends down to a calf wheel 18. It will readilybe seen that the pull, or stress, on the cable as delivered to thesheave 10a will correspond to the load and that the hanger 8a and bars12 form a lever system somewhat similar to a scale delivering aproportion of the load on the sheave 10a to the plunger 21. The plungerhas an area having relation to the lever connections 8a and bars 12 inconnection with the division of the load through the several sheaves sothat the pressure delivered on the plunger will preferably indicate onan indicator 24 the load carried by the drill, but the indicator mayindicate simply the pressure and the load'can be readily tabulated fromsuch indication.

In the present invention this pressure difference in the cylinder 22 isutilized as a control in playing out the cable 17 during the drillingoperation, as will be hereinafter fully described.

A drum 25 is journaled on a shaft 26 and this shaft is carried bybearings 27 on a, frame 28. The drum is provided with the usual brakes29 and is driven from a gear 30 through a clutch 31 in the usual manner.The gear 30 meshes with a gear 32, the meshed relation as to thisparticular gear not being shown in Fig. 4, the gear being off-set in thedrawing to permit of showing the intermediate gears which in the actualdevice are below the plane of the gears 30 and 32 (see Fig. 4). The gear32 isfixed on a shaft 33, the shaft 33 being journaled on the frame. Theshaft 33 has gears 34, 35, 36 and 37 of different diameters and thesegears mesh with gears 38, 39, 40 and 41 respectively fixed on ashaft-45a. Gears 43, and 44 are'fixed on the shaft 33 and clutches 42are? carried by thegears 43 and 44 and are adapted to lock the gears 10634, 35, 36 and 37 with the shaft 33, as may be desired. These clutchesare band clutches aircontrolled and of usual construction, a similarclutch beingshown in detail in Fig. 7. A gear 45 s fixed on a shaft 45aand meshes with a gear 46. The gear 46 is mounted 'on a crank shaft 47of an engine 48, the engine shown being an internal combustion engine. Ashaft 49 is-jour- 'naled in the frame below the plane carrying theshafts 26 and 33. A gear 50 is jounnaled on the shaft 49 and meshes withthe gear 43. A gear 51 is also journaled on the shaft 49. A gear 52 isfixed on the shaft 49 and drives a gear 53. A sprocket 54 is fixed withthe gear 53 and a chain (not shown) extends from the sprocket 54 anddrives the table 2. A clutch driver 55 is. fixed on the shaft 49.Clutches 56 and 57 are mounted on the driver and are adapted to lockeither, or both, the gear 50, or gear 51' with the driver.

These are air-controlled clutches of the ordinary 1 the gear 58. Apiston 65 works in the cylinder 64.

A rod-66 extends from the piston to a rock arm 6''! and the rock armoperating on the band tightens and releases the same. A spring 68 tendsto move the rock arm in release position. Air is delivered to thecylinder 64 through a pipe 69 connected to a passage '70 in the shaft59, the

passage extending to a pipe connection '71 at the end of theshaft. Thisgeneral construction of band clutch in the different clutches, with oneexception hereafter noted, is similar to the 5 clutches used in eachclutch referred to. In

playing out the cable in' lowering the drill pipe,

it has been common to-use the brakes, such as the brakes '29, forcontrolling the drum. With the tremendous loads involved and thisslippage severe sear is encountered 'and it is the desire "to utilizethe braking effect of the motor to on the air motor.

assist in controlling the unwinding movement of the drum. By setting theclutch 61 and locking the gears 58 and 60 together the unwindingmovement of the drum is communicated through the gears 58 and 60 and thegear 44 to the shaft 33, and the motion may be taken from the shaft 33through any of the speed changing gears to the shaft 45a and thuscommunicated to the engine. The gears 58 and 60 being intermediate gearsin effect reverse the movement so that the unwindingmover'nent of thedrum effecting a forward movement of the engine through the speedchanging device may be communicated to the engine and using suitablegears of the speed changing device the ngine may be given a very highacceleration with a consequent braking, or retarding action.'.

The shaft 59 and gear 58 form a convenient means through which tocontrol the drum during the drilling action. A gear 72 is journaled onthe shaft 59 and a jaw clutch '73 is adapted to lock the gear '72 withthe shaft 59. The gear '12 meshes with a gear 74. The gear 74 is drivenby an air motor 75 receiving its air through pipes 75a. The pipes arecontrolled by a valve 16, the

valve having a control arm 7'7. A link '78 extends from the arm '77 to abell crank lever '79 pivoted A rod extends from the opposite end of thebell crank lever and the rod is connected with a piston 81. Thepiston 81operates in a cylinder 82 and the pipe 23 leads into the cylinder. Aspring 810 exerts counter presthe brake to the engine forms a convenientmeans for communicating the control movement to the drum.

What" I claim as new is:- 1. In a draw works, the combination of a drillpipe; a line supporting the pipe; a drum operating the line; a motor; 'agear connection between the motor and drum driving the drum in a windingdirection with a forward running of the motor; and means driven by thedrum rotated in an unwinding direction driving the motor in a forwarddirection.

2. In a draw works, the combination of a drill pipe; a line supportingthe pipe; a drum operating the 1ine;,a motor; a gear connectioncomprising a speed changing mechanism between the motor and the drumdriving the drum in a winding direction with a forward running of themotor; and means driven by the drum rotated in an unwinding directiondriving the motor through the speed changing mechanism in a forwarddirection. 1 v

3. In a draw works, the combination of a,drill pipe; a line supportingthe pipe; a drum operating the line; a motor; a gear connectionbetweenthe motor and drum driving the drum in a winding direction witha forwardrunning of the motor; means driven by the'drum rotating in an unwindingdirection driving the motor in a forward direction; a pressure deviceresponsive to line pull; and means controlled by the device drum andline feeding the drill.-

4. In a draw works, the combination of a drill pipe; 2. line supportingthe pipe; a drum operating the line; a motor; a gear connection betweenthe motor and drum driving the drum in a winding direction with aforward running of the motor; means including a gear connection drivenby the drum rotated in an unwinding direction driving the motor in aforward direction; and means actuated by the motor through one of thegear connections driving a drill.

5. In a. draw works, the combination of a drill pipe; a line controllingthe drill pipe; a drum on which the line is wound; a gear fixed on thedrum; a retarding gear meshing with the gear on the drum; a motor; adirect gear connection comprising a, speed changing device between themotor and the drum driving the drum in a forward direction; a connectionbetween the retarding,gear and the speed changing device driving the.motor in a forward direction from the drum running in an unwindingdirection; a clutch engaging and disengaging the retarding gear from thespeed changing device; a clutch disconnecting the direct connectionbetween the motor and the drum; a control mechanism responsive to pullon the line; a motor controlledby the control mechanism; a gearconnection between the motor and the retarding gear; and a clutchcontrolling the last-named gear connection.

HARRY L. TURNEY.

